diff options
| -rw-r--r-- | arch/x86/kernel/cpu/perf_event_amd.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/arch/x86/kernel/cpu/perf_event_amd.c b/arch/x86/kernel/cpu/perf_event_amd.c index 573458f1caf..b87e0b6970c 100644 --- a/arch/x86/kernel/cpu/perf_event_amd.c +++ b/arch/x86/kernel/cpu/perf_event_amd.c @@ -348,10 +348,12 @@ static void amd_pmu_cpu_offline(int cpu) raw_spin_lock(&amd_nb_lock); - if (--cpuhw->amd_nb->refcnt == 0) - kfree(cpuhw->amd_nb); + if (cpuhw->amd_nb) { + if (--cpuhw->amd_nb->refcnt == 0) + kfree(cpuhw->amd_nb); - cpuhw->amd_nb = NULL; + cpuhw->amd_nb = NULL; + } raw_spin_unlock(&amd_nb_lock); } |